According to one anonymous source he was planning to retire from acting for years and just looking for the right project to leave with a "bang". So if true, looks like he really is looking to go all out!

That's cool as (and exclusive because I can't find that info elsewhere). Reminds me of how PSH was there on the early days of The Master screenplay and he was the one who told PTA that the movie was more Quell's story and less Dodd's.